4 Things You Didn't Know About the Ladies of Birchbox

Chances are one of the highlights of your month is tearing into your current Birchbox to see what new goodies the team headed by co-founders Katia Beauchamp and Hayley Barna have rounded up this time. If you aren't one of the thousands of customers looking forward to a delivery, here's the deal: For $10 per month, Birchbox ships you a selection of handpicked beauty samples to your door. When you inevitably fall in love with a product, you can purchase the full-size version on the Birchbox website.

Beauchamp, 30, and Barna, 29, brainstormed the idea as classmates at Harvard Business School. Beauty samples were nothing new, but the pair reinvented the way companies hand them out by having a team personally test and select the products, so that every girl gets the benefit of a beauty-editor best friend. And since we really do wish these two could be our best friends, here's a little glimpse into the minds of the women who changed your beauty cabinet.

Their hidden strengths: Katia has a special talent for starting impromptu dance parties, and Hayley comes up with all her best ideas while meditating—in the shower.

Their time-saving tips: Hayley skips the daily shampoo in favor of dry shampoo and a hair straightener. Katia increases efficiency by insisting their employees indicate when they need a response in emails.

Their must-haves for life: Katia lives for her Nike FuelBand and SodaStream. Hayley loves her hair straightener and her microwave.

Their best career advice: "Make sure you truly love the business or product," says Hayley. "If you can't stop thinking about it before you go to bed at night and are thinking about it during your morning shower, that's a good sign." Katia's take: "Trust yourself. You can do more than you ever imagined."